← Glossary Morphology sessile Attached directly to the stem without a stalk. A sessile leaf lacks a petiole ; a sessile flower lacks a pedicel . Plants Using This Term (11) Ammannia capitellata — Cogswamp Toothcup Ammannia pedicellata — Golden Nesaea Hesperis matronalis — Dame's Rocket Hypericum perforatum — St. John's Wort Limnophila sessiliflora — Asian Ambulia Maianthemum racemosum — False Solomon's Seal Myosotis scorpioides — Water Forget-me-not Potamogeton crispus — Curly-leaf Pondweed Ptelea trifoliata — Common Hoptree Toxicodendron pubescens — Atlantic Poison Oak Trillium grandiflorum — Great White Trillium Related Terms achene acuminate aerial root alternate annual axillary basal berry biennial bract calyx capsule cauline clasping cordate corolla corymb crenate cyme cypsela deciduous dentate drupe entire evergreen fenestration follicle glaucous inflorescence lanceolate legume ligulate lobed opposite ovary palmate panicle papilionaceous pappus pedicel perennial petiole pinnate pubescent raceme rachis rhizome rosette sepal serrate silique spadix spathe spatulate stamen stipule succulent taproot ternate thallus trifoliate umbel undulate whorled